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CBSE 12th Standard Biology Subject Human Reproduction Ncert Exemplar 1 Mark Questions 2021

Published on: 24/05/2021

QB365 Provides the updated NCERT Examplar Questions for Class 12 Biology, and also provide the detail solution for each and every ncert examplar questions , QB365 will give all kind of study materials will help to get more marks

Download CBSE Class 12th Standard CBSE Biology question papers, sample papers, important questions, and previous year solved papers in PDF format. Get free study materials, NCERT solutions, and exam preparation resources for Class 12th Standard CBSE Biology

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Std: 12th Standard CBSE - Biology

chapter: - NCERT Exemplers

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Questions:

1 Marks

9 x 1 = 9

Female reproductive organs and associated functions are given below in column I and column II. Fill in the blank.

Column I	Column II
Ovaries	Ovulation
Oviduct	A
B	Pregnancy
Vagina	Birth

What is the role of cervix in the human female reproductive system?

The path of sperm transport is given below. Provide the missing steps in blanks boxes.

Give the name of structures by which testes are suspended in the scrotum.

Name the germ layer that produces skeleton and muscles.

Give the names and functions of the hormones involved in the process of spermatogenesis.Write the names of the endocrine glands from where they are released.

What is the significance of ampullaryisthmic junction in the female reproductive tract?

Mention the importance of LH surde during menstrual cucle.

Which type of cell division forms spermatids from the secondary spermatocytes?

Generic 2

1 x 2 = 2

10.

What is the difference between a primary oocyte and a secondary oocyte ?

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Answers Key:

1 Marks

9 x 1 = 9

()
A - Fertilisation
B - Uterus

()
Cervix helps in regulating the passage into the female uterus. It also forms the birth canal along with vagina to facilitate parturition.

()
A - Vasa efferentia, B - Vas deferens.

()
Spermatic cords.

()
Mesoderm

()

Hormone	Endocrine gland	Function
(i) FSH	Anterior pituitary	Stimulates Sertoli cells to secrete some factors which help in spermatogenesis.
(ii)ICSH/LH	-do-	Stimulates Leydig's cells of testes to secrete androgens (especially testosterone) which regulate spermatogenesis.

()
Ampullary-isthmic junction is the site in the fallopian tube where fertilisation occurs.

()
LH surge (maximum level of luteinizing hormone) leads to ovulation,i.e. the rupture of mature Graafian follicle and the consequent release of ovum.

()
Meiosis II (similar to mitosis).

Generic 2

1 x 2 = 2

10.

Primary oocyte is a diploid cell formed in foetal ovary when the gamete mother cell, oogonia is arrested at prophase-I of meiosis. Secondary oocyte is the haploid cell formed from primary oocyte that completes its first meiotic division, during puberty and produces the female gamete ova (n).